20101211211 has 8 divisors (see below), whose sum is σ = 26802400464. Its totient is φ = 13400414720.

The previous prime is 20101211189. The next prime is 20101211227. The reversal of 20101211211 is 11211210102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20101211211 - 2⁹ = 20101210699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20101211311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55675 + ... + 208091.

It is an arithmetic number, because the mean of its divisors is an integer number (3350300058).

Almost surely, 2^20101211211 is an apocalyptic number.

20101211211 is a deficient number, since it is larger than the sum of its proper divisors (6701189253).

20101211211 is a wasteful number, since it uses less digits than its factorization.

20101211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196381.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20101211211 its reverse (11211210102), we get a palindrome (31312421313).

The spelling of 20101211211 in words is "twenty billion, one hundred one million, two hundred eleven thousand, two hundred eleven".